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Allium (ornamental onion) from seed
Allium spp. · also searched as easy to grow alliums, growing alliums from bulbs
- Sowing depth
- 4 to 8 in (10 to 20 cm) for large types
- Before sowing
- Plant in autumn.
- Spacing
- 6 to 14 in (15 to 35 cm) for large types
Sowing
Plant in autumn: large alliums 4 to 8 in deep and 6 to 14 in apart; small ones 3 to 4 in deep and 1 to 4 in apart (Fedco).
Care and transplanting
Foliage fades before the flower, so interplant with perennials.
Problems
Rot in wet soil; rodents leave alliums alone.
Saving seed
Seed heads can be dried; named varieties spread by offsets.